<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        * {
            padding: 0;
            margin: 0;
        }
        
        .box {
            width: 100%;
            height: 400px;
            border: 1px solid #000;
            position: relative;
        }
        
        .one {
            width: 200px;
            height: 200px;
            background-color: orange;
            position: absolute;
            left: 100px;
            top: 100px;
            transition: all 1.5s;
            opacity: 0;
        }
        
        .box:hover .one {
            left: 800px;
            top: 200px;
            opacity: 1;
            border-radius: 50%;
        }
    </style>
</head>

<body>
    <div class="box">
        <div class="one"></div>
    </div>
</body>

</html>